@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* Gumroad-inspired Color Palette */
  --primary: #ff90e8;
  --primary-hover: #ff7de4;
  --secondary: #6c7293;
  --accent: #36d1dc;
  --success: #2ecc71;
  --warning: #f39c12;
  --danger: #e74c3c;
  
  /* Neutral Colors */
  --white: #ffffff;
  --gray-50: #fafbfc;
  --gray-100: #f1f3f5;
  --gray-200: #e9ecef;
  --gray-300: #dee2e6;
  --gray-400: #ced4da;
  --gray-500: #adb5bd;
  --gray-600: #6c757d;
  --gray-700: #495057;
  --gray-800: #343a40;
  --gray-900: #212529;
  
  /* Light Mode */
  --bg-primary: var(--white);
  --bg-secondary: var(--gray-50);
  --bg-tertiary: var(--gray-100);
  --text-primary: var(--gray-900);
  --text-secondary: var(--gray-700);
  --text-muted: var(--gray-600);
  --border: var(--gray-200);
  --border-light: var(--gray-100);
  --shadow: rgba(0, 0, 0, 0.1);
  --shadow-light: rgba(0, 0, 0, 0.05);
}

/* Dark Mode */
[data-theme="dark"] {
  --bg-primary: var(--gray-900);
  --bg-secondary: var(--gray-800);
  --bg-tertiary: var(--gray-700);
  --text-primary: var(--white);
  --text-secondary: var(--gray-200);
  --text-muted: var(--gray-400);
  --border: var(--gray-700);
  --border-light: var(--gray-600);
  --shadow: rgba(0, 0, 0, 0.3);
  --shadow-light: rgba(0, 0, 0, 0.15);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: all 0.2s ease;
}

/* App Container */
.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.header {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.app-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.theme-toggle {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 1rem;
}

.theme-toggle:hover {
  background: var(--bg-secondary);
  border-color: var(--border-light);
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2px;
}

.toggle-btn {
  background: transparent;
  border: none;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 6px;
  transition: all 0.2s ease;
  font-family: inherit;
}

.toggle-btn.active {
  background: var(--bg-primary);
  color: var(--text-primary);
  box-shadow: 0 1px 3px var(--shadow-light);
}

/* Pills Selection */
.pill-selection {
  margin-bottom: 1.5rem;
}

.pills-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.pill {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.pill:hover {
  background: var(--bg-secondary);
  border-color: var(--primary);
}

.pill.selected {
  background: var(--primary);
  color: var(--gray-900);
  border-color: var(--primary);
}

.pill-new {
  background: var(--bg-secondary);
  border: 2px dashed var(--border);
  color: var(--text-muted);
}

.pill-new:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.pill-actions {
  display: flex;
  gap: 0.25rem;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.pill:hover .pill-actions {
  opacity: 1;
}

.pill-action-btn {
  background: none;
  border: none;
  padding: 0.25rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.75rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  transition: background-color 0.2s ease;
}

.pill-action-btn:hover {
  background: var(--bg-primary);
}

.pill-action-btn:first-child:hover {
  background: var(--warning);
}

.pill-action-btn:last-child:hover {
  background: var(--danger);
}

.form-actions-inline {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.btn-small {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

/* Main Content */
.main-content {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
  gap: 2rem;
  padding: 2rem;
}

/* Form Section */
.form-section {
  background: var(--bg-primary);
  border-radius: 12px;
  border: 1px solid var(--border);
  height: fit-content;
}

.form-container {
  padding: 2rem;
}

.form-group-section {
  margin-bottom: 2rem;
}

.form-group-section:last-child {
  margin-bottom: 0;
}

.section-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.form-input, .form-textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 0.875rem;
  font-family: inherit;
  transition: all 0.2s ease;
}

.form-input:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(255, 144, 232, 0.1);
}

.form-input::placeholder, .form-textarea::placeholder {
  color: var(--text-muted);
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* Items */
.item-row {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 0.75rem;
  background: var(--bg-secondary);
  border-radius: 8px;
  margin-bottom: 0.5rem;
}

.item-description-row {
  display: flex;
  width: 100%;
}

.item-description-field {
  width: 100%;
}

.item-description-field .form-input {
  width: 100%;
}

.item-details-row {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.item-hsn-field {
  flex: 1;
}

.item-quantity-field {
  width: 80px;
}

.item-rate-field {
  width: 120px;
}

.item-total-field {
  width: 120px;
}

.item-field {
  display: flex;
  flex-direction: column;
}

.item-total {
  font-weight: 600;
  color: var(--text-primary);
  text-align: right;
  font-size: 0.875rem;
}

.btn-icon {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.25rem;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.btn-icon:hover {
  background: var(--danger);
  color: white;
}

/* Buttons */
.btn {
  background: var(--secondary);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--shadow);
}

.btn-primary {
  background: var(--primary);
  color: var(--gray-900);
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--bg-secondary);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: var(--gray-900);
}

/* Totals */
.totals-container {
  background: var(--bg-secondary);
  border-radius: 8px;
  padding: 1.5rem;
}

.total-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.total-row:last-child {
  margin-bottom: 0;
}

.total-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.total-value {
  font-weight: 600;
  color: var(--text-primary);
}

.total-final {
  border-top: 1px solid var(--border);
  padding-top: 0.75rem;
  margin-top: 0.75rem;
}

.total-final .total-label,
.total-final .total-value {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.tax-input-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.tax-input {
  width: 80px;
  margin: 0;
}

/* Actions */
.form-actions {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 1rem;
  align-items: center;
}

.form-actions .btn {
  flex: 1;
  padding: 1rem 1.5rem;
  font-size: 1rem;
}

.form-actions .btn-secondary {
  flex: 0 0 auto;
  min-width: 120px;
}

/* Preview Section */
.preview-section {
  background: var(--bg-primary);
  border-radius: 12px;
  border: 1px solid var(--border);
  height: fit-content;
  position: sticky;
  top: calc(80px + 2rem);
}

.preview-container {
  padding: 2rem;
}

.preview-header {
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.preview-header h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* Invoice Preview */
.invoice-preview {
  background: white;
  color: var(--gray-900);
  padding: 2rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  font-size: 0.875rem;
  line-height: 1.5;
  min-height: 400px;
}

.invoice-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--gray-200);
}

.invoice-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  margin: 0;
}

.invoice-details {
  text-align: right;
  font-size: 0.875rem;
}

.invoice-parties {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.party-info h4 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-600);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.party-details {
  color: var(--gray-800);
}

.invoice-table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
}

.invoice-table th {
  background: var(--gray-50);
  padding: 0.75rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.75rem;
  color: var(--gray-700);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--gray-200);
}

.invoice-table td {
  padding: 0.75rem;
  border-bottom: 1px solid var(--gray-100);
}

.invoice-totals {
  margin-left: auto;
  width: 300px;
  background: var(--gray-50);
  border-radius: 8px;
  padding: 1.5rem;
}

.invoice-totals table {
  width: 100%;
}

.invoice-totals td {
  padding: 0.5rem 0;
  border: none;
}

.invoice-totals .final-total {
  border-top: 2px solid var(--gray-300);
  padding-top: 0.75rem;
  margin-top: 0.5rem;
}

.invoice-totals .final-total td {
  font-weight: 700;
  font-size: 1rem;
}

/* Responsive */
@media (max-width: 1024px) {
  .main-content {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .preview-section {
    position: static;
  }
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: flex;
  }
  
  .main-content {
    padding: 1rem;
    grid-template-columns: 1fr;
    position: relative;
  }
  
  .form-section {
    display: block;
  }
  
  .preview-section {
    display: none;
    position: static;
  }
  
  .preview-section.mobile-active {
    display: block;
  }
  
  .form-section.mobile-hidden {
    display: none;
  }
  
  .form-container,
  .preview-container {
    padding: 1.5rem;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .item-row {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
  
  .item-field {
    min-width: 0;
  }
  
  .invoice-parties {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .invoice-preview {
    padding: 1rem;
  }
  
  .invoice-title {
    font-size: 1.5rem;
  }
  
  .app-title {
    font-size: 1.25rem;
  }
  
  .header-content {
    padding: 0 1rem;
  }
}

/* Invoice Browser - Full Page Styles (Gumroad-inspired) */
.hidden {
  display: none !important;
}

.invoice-browser-page {
  position: fixed;
  inset: 0;
  background: var(--bg-secondary);
  z-index: 1000;
  display: grid;
  grid-template-rows: auto 1fr;
}

.browser-header {
  position: sticky;
  top: 0;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
}

.browser-header-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.browser-back-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
}

.browser-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.browser-summary {
  margin-left: auto;
  display: flex;
  gap: 1rem;
  color: var(--text-secondary);
}

.browser-searchbar {
  max-width: 1200px;
  margin: 0 auto 1rem;
  padding: 0 2rem 1rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
}

.browser-content {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  padding: 1rem 2rem 2rem;
  overflow-y: auto;
}

.auth-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1100;
  backdrop-filter: blur(4px);
}

.auth-modal__content {
  background: var(--bg-primary);
  border-radius: 12px;
  box-shadow: 0 20px 48px var(--shadow);
  padding: 2rem;
  width: min(90%, 420px);
  position: relative;
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.auth-modal__title {
  margin: 0;
  color: var(--text-primary);
  font-size: 1.5rem;
  font-weight: 600;
}

.auth-modal__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  color: var(--text-muted);
  padding: 0.25rem;
  border-radius: 6px;
  transition: color 0.2s ease, background 0.2s ease;
}

.auth-modal__close:hover {
  color: var(--text-primary);
  background: var(--gray-200);
}

[data-theme="dark"] .auth-modal__close:hover {
  background: var(--gray-700);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.auth-form label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
}

.auth-form input {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.95rem;
}

.auth-form input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
}

.auth-submit {
  margin-top: 0.5rem;
  width: 100%;
}

.auth-modal__toggle {
  font-size: 0.9rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.25rem;
  justify-content: center;
}

.auth-toggle-btn {
  background: none;
  border: none;
  color: var(--primary);
  font-weight: 600;
  cursor: pointer;
  padding: 0;
}

.auth-toggle-btn:hover {
  text-decoration: underline;
}

.auth-modal__message {
  min-height: 1.25rem;
  text-align: center;
  font-size: 0.85rem;
  margin: 0;
}

.auth-modal__message--error {
  color: #dc2626;
}

.auth-modal__message--success {
  color: #16a34a;
}

.browser-controls {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
}

.search-controls {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: center;
}

.browser-stats {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.invoice-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}

.invoice-item {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  transition: all 0.2s ease;
  box-shadow: 0 2px 4px var(--shadow-light);
}

.invoice-item:hover {
  box-shadow: 0 4px 12px var(--shadow);
  border-color: var(--primary);
  transform: translateY(-1px);
}

.invoice-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.invoice-number {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary);
}

.invoice-total {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.invoice-item-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}

.invoice-project {
  grid-column: 1 / -1;
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-top: 0.25rem;
}

.invoice-client {
  font-weight: 500;
  color: var(--text-primary);
}

.invoice-company {
  color: var(--text-secondary);
  text-align: right;
}

.invoice-item-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.invoice-date {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.invoice-item-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.btn-small {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  border-radius: 6px;
}

.btn-small.btn-outline {
  border-width: 1px;
}

.btn-danger {
  background: var(--danger);
  color: var(--white);
  border: 1px solid var(--danger);
}

.btn-danger:hover {
  background: #c0392b;
  border-color: #c0392b;
}

.no-invoices {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--text-muted);
}

.no-invoices p {
  font-size: 1.1rem;
  margin: 0;
}

/* Responsive design for invoice browser */
@media (max-width: 768px) {
  .browser-header-content {
    padding: 0.75rem 1rem;
  }

  .browser-searchbar {
    grid-template-columns: 1fr;
    padding: 0 1rem 1rem;
  }
  
  .search-controls {
    grid-template-columns: 1fr;
  }
  
  .browser-stats {
    flex-direction: column;
    gap: 0.5rem;
    align-items: flex-start;
  }
  
  .invoice-item {
    padding: 1rem;
  }
  
  .invoice-item-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  
  .invoice-item-details {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
  
  .invoice-project {
    margin-top: 0.5rem;
  }
  
  .invoice-company {
    text-align: left;
  }
  
  .invoice-item-meta {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
  
  .invoice-item-actions {
    flex-direction: column;
  }
  
  .btn-small {
    text-align: center;
  }
}

/* Payment Information Styles */
.payment-info {
  margin-top: 1rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: 8px;
  border: 1px solid var(--border);
  transition: all 0.2s ease;
}

.payment-info .form-group {
  margin-bottom: 1rem;
}

.payment-info .form-group:last-child {
  margin-bottom: 0;
}

.payment-info .form-label {
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.payment-info .form-input,
.payment-info .form-textarea {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  transition: all 0.2s ease;
}

.payment-info .form-input:focus,
.payment-info .form-textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(255, 144, 232, 0.1);
}